hopefully being on this forum, my response wont sound rude but informative instead!!!
goldfish should never, ever be kept in a bowl.
i can not say this enough.
a single
fancy goldfish should have 15g of overly filtered water (in other words the filter should be rated for at least 30g)
a comet goldfish will grow, in the aquarium, up to 8 inches long.
a pond- 12-15 inches long.
id strongly suggest taking them both back.
the least a desk setup should be (to keep -any- fish healthy) no less than 2.5g with a small filter and a heater.
some basic information that is a must-
http://www.wetwebmedia.com/FWSubWebi...estcycling.htm
fish that you can fit in a 2.5g tank are probably limited to a betta.
if you bump it up to a 5g tank you can get a few Endlers Livebearers, a few guppies, a Dwarf Gourami, Threadfin Rainbows, a single Dwarf Puffer, OR a single Dwarf Frog.
as in pick one of those, not all of them. most of the fish in there can live with other shrimp but not a cray fish.
good luck with the fish!!
-ashley